Why does the check engine light in my Mountaineer turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Mountaineer firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.

Are Mercury Mountaineer engine noises bad?

Strange engine sounds can be a sign something’s off in your Mercury Mountaineer. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my Mercury Mountaineer engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I use water in my Mercury Mountaineer radiator?

It’s not recommended you put water in your Mountaineer radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

What can cause a Mountaineer engine to suddenly stop?

Your Mountaineer car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Where can I go for Mercury Mountaineer repair?

For Mercury Mountaineer engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Reliable Repairs for 2009 Mercury Mountaineer Engines

Learn about

2009 Mercury Mountaineer Trim Options

Select your Mercury Mountaineer trim level to learn more about Mercury-recommended engine repair. Use the following chart to find information.

V6/4.0L

V8/4.6L

Repairs for Your 2009 Mercury Mountaineer

Nothing lasts forever. Even your Mercury Mountaineer’s engine parts and components will change. We’re here to help when something stops working. Click on a repair below to learn more about 2009 Mercury Mountaineer repairs.

We Know Mercury Mountaineer Engines

Mercury Mountaineer engines are known for their reliability. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go wrong on the road. If they do, you’ll have to find a dependable 2009 Mercury service center — quick! Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know Mercury Mountaineer engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 2009 Mercury Mountaineer

An illuminated check engine light on your Mercury Mountaineer is one of the first signs it's time to 'brake' for engine service. A check engine light that’s flashing or steadily illuminated could point to problems with your vehicle's ignition, Causes may include a faulty oxygen sensor, worn spark plug, a clogged catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your Mountaineer to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. rattling sounds, burning smells, or misfiring.

2009 Mountaineer Engine Services

When your Mercury Mountaineer engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 2009 Mountaineer engine repairs and you can feel good knowing that we only use Mercury-compliant replacement parts such as the cambelt, motor oil seal, fuses, or a different component.

Engine Q&A 2009 Mercury Mountaineer

Why does the check engine light in my Mountaineer turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Mountaineer firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.
Are Mercury Mountaineer engine noises bad? Strange engine sounds can be a sign something’s off in your Mercury Mountaineer. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my Mercury Mountaineer engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I use water in my Mercury Mountaineer radiator? It’s not recommended you put water in your Mountaineer radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
What can cause a Mountaineer engine to suddenly stop? Your Mountaineer car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Where can I go for Mercury Mountaineer repair? For Mercury Mountaineer engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.